From the photographer: "While taking this photo at Milad Tower (435m) Tehran, I was thinking about the book I had read in my teen hood: The City and the Stars by Arthur C. Clark. The book takes place one billion years in the future, in the city of Diaspar. By this time, the Earth is so old that the oceans have gone and humanity has all but left. As far as the people of Diaspar know, they are the only city left on the planet. The city of Diaspar is completely enclosed. Nobody has come in or left the city for as long as anybody can remember."
Mehdi Momenzadeh - celestialviews.net